#position1{
    width:100px;
    height:100px;
    background-color: cornflowerblue;
    position: absolute;
    left:20px;
    top:20px;
    z-index:2;
}
#position2{
    width:100px;
    height:100px;
    background-color: blueviolet;
    position: absolute;
    left:10px;
    top:10px;
    z-index:1;
}
#position3{
    width:100px;
    height:100px;
    background-color: red;
    position: absolute;
    left:30px;
    top:30px;
    z-index:3;
}
